JPH11282473A - Electro-acoustic transducer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the contact pressure of a mounting member to an electric output part always constant by improving the precision of positioning in the direction of elastic deformation of a spring terminal, and to improve the solderability of an acoustic transducer to an electric input part. SOLUTION: Such a reference plane is set on an end face 13a of a case 13 as a distance across a printed board 7 in the direction of elastic distortion of a spring terminal 15 becomes always constant in a state in which a main body 6 is fixed, and a horizontal part 15b of the spring terminal 15 is brought into close contact with the end face 13a and a connection part 15a is soldered to a wiring pattern 14a of the printed board 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electro-acoustic transducer used as voice communication and confirmation sound generating means, and more particularly to an electro-acoustic transducer applied to a small electronic device such as a mobile phone or a pager. Thus, the present invention relates to an improvement in a mounting technique when a spring terminal for inputting an electric signal is retrofitted to a completed electroacoustic transducer main body.

[0002]

2. Description of the Related Art When an electroacoustic transducer is used as voice communication or a confirmation sound generating means in a small electronic device, the method of mounting the electroacoustic transducer on the small electronic device includes soldering using pin terminals, surface mounting technology, and the like. There are various methods, such as mounting by using a method. In recent years, with the spread of mobile phones and other products, product types have increased and product life has been shortened, mounting methods for electro-acoustic transducers have been reviewed. Is attracting attention. Incidentally, it is necessary to set the shape and the like of the spring terminal of the electroacoustic transducer in accordance with the small electronic device to be incorporated. To improve the versatility of the electro-acoustic transducer by securing the degree of freedom of the combination of the electro-acoustic transducer and the spring terminal, and by improving the versatility of the electro-acoustic transducer by easily changing the shape of the spring terminal, a spring terminal is attached to the completed electro-acoustic transducer body. The retrofitting method is effective.
Hereinafter, a conventional example of an electroacoustic transducer configured by employing such a method will be described.

[0005] Reference numeral 1 in FIG. 11 shows an example of an electromagnetic sounding body as an electroacoustic transducer applied to a conventional small electronic device. This electromagnetic sounding body 1 has a cylindrical case 3 in which a sounding portion 2 which sounds when an electric signal is supplied is formed.
The spring terminals 5 are respectively connected to the + and-wiring patterns 4a of the printed circuit board 4 serving as an electric input unit fixed to the upper part of the sound generation unit 2 (one spring terminal 5 on the front side in FIG. 11). Only visible). The spring terminal 5 is formed in a substantially V-shape from an elastic thin material such as spring steel, stainless steel, beryllium copper, or titanium copper, and one end is joined to the wiring pattern 4a of the printed circuit board 4 by soldering. You. This electromagnetic sounding body 1
For example, the lower surface of the case 3 is fixed to the inner surface of the main body case 6 of the mobile phone by a fixing means such as double-sided adhesive tape or fitting, and the spring terminal 5 is connected to the main body case 6 after the case 3 is fixed to the main body case 6. The printed circuit board 7 serving as an electric output unit incorporated upward in parallel with the main body case 6 is pushed and elastically deformed, so that the other end thereof elastically contacts a part of the wiring pattern 7a of the printed circuit board 7.

When the spring terminal 5 is joined to the wiring pattern 4a of the printed circuit board 4, the spring terminal 5 rises obliquely and shortly from a joint 5a to the wiring pattern 4a and extends laterally. After slightly projecting to the side of the case 3 via the horizontal portion 5b on which it is placed, the case 3 is bent sharply, and the deformed portion 5d extends obliquely upward from the bent portion 5c. The positioning of the spring terminal 5 in the up-down direction (elastic deformation direction) is performed by bringing the joint portion 5a into contact with the wiring pattern 4a of the printed board 4, and the deformed portion 5d is pressed by the upper printed board 7. When the horizontal part 5b is the case 3,
Contacting the end surface 3a, the deformed portion 5d bends,
Contact portion 5e for wiring pattern 7a of printed circuit board 7
Is assumed to be constant.

FIG. 12 is a modification of the electromagnetic sounding body 1 of FIG. 11, and the same components as those of FIG. 11 are denoted by the same reference numerals. In this electromagnetic sounding body 1A, the spring terminal 5 is formed such that the joining portion 5a extends straight from the horizontal portion 5b as it is and exists on the same plane. The spring terminal 5
The horizontal part 5b is placed directly on the printed circuit board 4, and the joint part 5a and the wiring pattern 4a are joined.

[0006]

In the case of the electromagnetic sounding body 1 shown in FIG. 11, the sounding portion 2 having the printed board 4 integrated therein is inserted into the case 3 and fixed, and the spring terminal 5 is fixed. The printed circuit board 4 is assembled by soldering to the wiring pattern 4a. However, due to the accuracy of assembly and part dimensions,
Vertical distance H between printed circuit board 4 and the end face of case 3
, And this distance H is equal to the joint 5 of the spring terminal 5.
a did not coincide with the vertical distance h between the horizontal portion 5b and the horizontal portion 5b.

If the distance H is shorter than the distance h, the spring terminals 5
Is inclined in the direction of the arrow (a), or the horizontal portion 5b floats from the end face 3a of the case 3. If the distance H is longer than the distance h, the connecting portion 5a is brought into contact with the wiring pattern 4a to tilt the spring terminal 5 in the direction of the arrow (b), and the horizontal portion 5b is reversed from the end face 3a of the case 3 in the above manner. Either floating in the direction, or bringing the horizontal part 5b into surface contact with the end face 3a of the case 3 to completely separate the joint part 5a from the wiring pattern 4a is selected. In other words, the vertical positioning of the spring terminal 5 is achieved by bringing the joint portion 5a into contact with the wiring pattern 4a of the printed circuit board 4.
As shown in FIG. 11, the horizontal portion 5b of the spring terminal 5 was not always in surface contact with the end face 3a of the case 3 due to the influence of the accuracy of assembly and part dimensions. End face 3a of case 3
When the position of the horizontal portion 5b of the spring terminal 5 with respect to
The contact pressure of the printed circuit board 7 with the wiring pattern 7a does not become an appropriate constant pressure, and the joint 5a is connected to the wiring pattern 4a.
In any case, it is inconvenient that the soldering becomes difficult, that is, the solderability is deteriorated when completely separated from the substrate.

Also, in the electromagnetic sounding body 1A shown in FIG. 12, since the built-in sounding portion 2 is composed of a plurality of components, the height l between the upper surface of the printed circuit board 4 and the lower surface of the case 3 is increased. However, variations occurred due to assembly and dimensional accuracy of parts. Therefore, the wiring pattern 7a of the printed circuit board 7
Is not constant as in the case of the electromagnetic sounding body 1 described above.

Therefore, the present invention improves the positioning accuracy of the spring terminal in the elastic deformation direction, so that the contact pressure of the spring terminal with respect to the electric output portion of the mounting member is always constant, and the sound generation portion is connected to the electric input portion by soldering or the like. It is an object of the present invention to provide an electroacoustic transducer capable of improving the joining property.

[0010]

According to the present invention, there is provided an electroacoustic transducer comprising: a sound generator for generating an electric signal when supplied with an electric signal; a case containing the sound generator; and an electric input unit formed on the sound generator. And a case in which the case is attached to a predetermined position of the attachment member so that the spring terminal comes into contact with an electric output portion provided on the attachment member by a contact pressure based on its elasticity. In this configuration, in a state where the spring terminal is attached to the attachment member, the spring terminal has a reference surface in which the distance between the spring terminal and the electric output portion is always constant. A spring terminal is abutted and joined to the electric input section.

According to the present invention, since the spring terminal is in contact with the reference surface and is joined to the electric input portion, in a no-load state, the contact portion with the reference surface and the electric output portion of the mounting member are connected. Is always constant. Further, in the state where the spring terminal is attached to the mounting member, the distance between the reference surface and the electric output portion of the mounting member with which the spring terminal comes into contact is always constant. Of course, the distance to the electric output unit becomes constant. as a result,
The positioning accuracy of the spring terminal in the elastic deformation direction is improved, and the contact pressure of the spring terminal with respect to the electric output portion of the mounting member is always constant, so that stable quality can be obtained. Further, in this state, the positional relationship between the spring terminal and the electric input unit can be set to any form that facilitates the connection, so that the bondability (for example, solderability) between the two can be improved. Can be.

It is most preferable that the reference surface is specifically provided on a case directly attached to the attachment member. When the case is composed of a combination of a plurality of members, it is necessary to provide a reference surface on a member directly attached to the attachment member, but the correlation positions of the plurality of members are always kept constant. If combined, the reference plane may be provided on any member. Similarly, if the position of the electric input unit with respect to the mounting member is always kept constant, such as when the printed circuit board or lead terminal serving as the electric input unit is integrally formed with the case, the reference surface may be provided on the electric input unit. Good.

[0013] With respect to the joint portion of the spring terminal and the electric input portion, it is general that both are in surface contact with each other, but in the present invention, both of them are partly separated or completely separated. This is a preferred mode. As described above, when the spring terminal and the joint of the electric input portion are separated from each other and the two are joined by a conductive joining means such as soldering, the conductive joining agent such as the solder spreads widely to the joint of the spring terminal and the contact area. As a result, the bonding strength is increased, the reliability against the external force acting on the spring terminal and the moment at the time of mounting is improved, and the conduction is stabilized.

Further, in the present invention, in addition to achieving the positioning of the spring terminal in the elastic deformation direction with high precision as described above, by providing positioning means for positioning in the direction substantially perpendicular to the elastic deformation direction, The positioning accuracy in the same direction is improved. As specific positioning means,
For example, there is a method of fitting a thin insertion piece formed at the joint of the spring terminal into a hole formed at the joint of the electric input unit.

Further, in the present invention, it is preferable that a flange portion which comes into surface contact with the reference surface is provided at a contact portion of the spring terminal with the reference surface. Thereby, the spring terminal stably abuts the reference surface, and the positioning accuracy in the vertical direction is further improved, and the workability when joining the spring terminal to the electric input unit is improved.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. (1) First Embodiment FIGS. 1 to 3 show an electromagnetic sounding body (electroacoustic transducer) 11 according to a first embodiment. This electromagnetic sounding body 11
Is a sound generating unit 1 that generates sound when an electric signal is supplied.
4 are provided in the + and-wiring patterns 14a of a printed circuit board (electric input section) 14 which is built in the cylindrical case 13 and the case 13b and is fixed above the sound generating section 12. 15 are joined together. The spring terminal 15 is formed in a substantially V-shape by an elastic thin plate material such as spring steel, stainless steel, beryllium copper, or titanium copper, and one end is joined to the wiring pattern 14a of the printed circuit board 14 by soldering. You. The case 13b is integrated with the case 13 by joining means such as welding at a position where the position of the lower surface that contacts the main body case (mounting member) 6 is regulated to a certain size with respect to the end surface 13a of the case 13. I have.

As shown in FIG. 1, for example, the electromagnetic sounding body 11 has a lower surface of a case 13b fixed to an inner surface of a main body case 6 of a mobile phone by a fixing means such as a double-sided adhesive tape. After being fixed to the main body case 6, the printed circuit board 13 is elastically deformed by being pushed by a printed circuit board (electric output portion) 7 incorporated in parallel with the main body case 6, and the other end is connected to the wiring pattern 7 a of the printed circuit board 7. The parts are brought into elastic contact.

When the spring terminal 15 shown in FIG. 4 is joined to the wiring pattern 14a of the printed circuit board 14,
From the joint 15a to the wiring pattern 14a, it rises obliquely and shortly and extends laterally, and the end surface of the case 13 (reference surface)
After slightly protruding to the side of the case 13 via the horizontal portion 15b placed on 13a, the case 13 is bent sharply, and the deformed portion 15d extends obliquely upward from the bent portion 15c, and a contact portion 15e is formed at the tip of the deformed portion 15d. ing. The positioning of the spring terminal 15 in the up-down direction (elastic deformation direction) is performed by bringing the horizontal portion 15b into surface contact with the end surface 13a of the case 13. As shown in FIG. 1, when the deformed portion 15 d is pressed by the upper printed board 7, the horizontal portion 15 b is moved from the printed board 7 to the end face 3 of the case 3 at a fixed position.
The contact portion 15e is brought into surface contact with the joining portion 15a, so that the deformed portion 15d is bent and the contact pressure of the contact portion 15e with the wiring pattern 7a of the printed circuit board 7 is set to be constant. The contact portion 15e is formed in a projecting shape to ensure contact with the wiring pattern 7a.

As shown in FIG. 3, the portion of the printed circuit board 14 where the wiring pattern 14a is provided
4 and a through hole (positioning means) 16 penetrating through the wiring pattern 14a. On the other hand, an insertion piece (positioning means) 17 which is bent toward the sounding section 12 and extends is formed at the joint 15 a of the spring terminal 15, and this insertion piece 17 is inserted into the through hole 16 of the printed circuit board 14. Thus, the joint 15a is joined to the wiring pattern 14a. In this case, the joining portion 15a is not in direct contact with the wiring pattern 14a, but is slightly separated from the wiring pattern 14a. By inserting the insertion piece 17 into the through hole 16, the joint 15 a is positioned in the horizontal direction along the surface of the printed circuit board 14. Although the through hole 16 is shown as a circular hole for clarity in the drawing, the positioning accuracy can be further increased if the through hole 16 has a shape similar to the horizontal cross-sectional shape of the insertion piece 17.

To assemble the electromagnetic sounding body 11,
First, the sound generating unit 12 with the printed board 14 integrated therein is inserted into the case 13 and fixed. Next, the spring terminal 15
By inserting the insertion piece 17 of the joint 15a into the through hole 16 of the printed circuit board 14, horizontal positioning is performed, and the horizontal portion 15b is brought into close contact with the end surface 13a of the case 13 to perform vertical positioning. While maintaining the state, the joint 15a is connected to the wiring pattern 14a of the printed circuit board 14.
Solder to

The spring terminal 15 of the electromagnetic type sounding body 11 is
The horizontal portion 15b abuts on the end surface 13a of the case 3 and is joined to the wiring pattern 14a of the printed circuit board 14, so that the horizontal portion 15b and the contact portion 15
The distance (indicated by H1 in FIG. 1) in the up-down direction from the position a is always constant. Further, in a state where the electromagnetic sounding body 11 is fixed to the main body case 6 and the printed circuit board 7 is incorporated, the wiring pattern of the printed circuit board 7 in which the end face 13a of the case 13 and the contact portion 15e of the spring terminal 15 contact. The distance in the up-down direction with respect to 7a (indicated by H2 in FIG. 1) is also constant.
Therefore, the distance from the horizontal portion 15b of the spring terminal 15 to the wiring pattern 7a is naturally constant. As a result of these,
The positioning accuracy of the spring terminal 15 in the vertical direction is improved, the contact pressure of the contact portion 15e on the wiring pattern 7a is always constant, and stable quality can be obtained.

The wiring pattern 1 of the printed circuit board 14
4a is slightly separated from the wiring pattern 14a.
And the contact area increases. Therefore, the bonding strength is improved, and the conduction is stabilized.

Further, the insertion piece 17 formed at the joint 15a of the spring terminal 15 is inserted into the through hole 16 of the printed board 14 so that the printed board 14
The positioning accuracy in the horizontal direction along the surface of the substrate is greatly improved. In soldering the joint portion 15a, both the wiring pattern 14a and the joint portion 15a can be uniformly heated via the insertion piece 17, thereby facilitating soldering and improving solderability. Is achieved.

(2) Second Embodiment Next, referring to FIG. 5, the spring terminal 1 of the first embodiment will be described.
A second embodiment in which the fifth embodiment is modified will be described. The spring terminal 25 shown in FIG.
On both sides of the horizontal portion 15b, a substantially triangular flange portion 2 closely attached to the end surface 13a of the case 13 together with the horizontal portion 15b.
1 and 22 are integrally formed. FIG. 6 shows that this spring terminal 25 is
a in the state joined to a, as shown in FIG.
Each flange 21 and 22 extends along the end face 13 a of the case 13. Therefore, the flange portions 21 and 22 formed on the pair of spring terminals 25 are formed symmetrically with the intermediate line between the spring terminals 25 and 25 as the symmetric line. The solid line in FIG. 5A indicates the lower spring terminal 25 in FIG. 6, and the two-dot chain line indicates the flange portions 21 and 22 of the upper spring terminal 25 in FIG.

According to the spring terminal 25 of the second embodiment, each of the flange portions 21 and 22 is brought into close contact with the end surface 13a of the case 13 together with the horizontal portion 15b.
The posture of itself becomes stable. As a result, the positioning accuracy in the vertical direction is further improved, and the workability when soldering the joint 15a to the wiring pattern 14a of the printed circuit board 14 is improved.

(3) Third Embodiment Next, referring to FIG. 7, the spring terminal 2 of the second embodiment will be described.
A third embodiment in which the joining workability of No. 5 is improved will be described.
In this case, as shown in FIG. 7, instead of individually forming the spring terminals 25, the pair of spring terminals 25, 25 are connected by the connection piece 31 and are formed collectively. The connecting piece 31 is connected to each of the flange portions 21 of the spring terminals 25, 25, and is connected to the horizontal portion 15b.
The spring terminals 25, 25 are defined in a positional relationship in which they are joined to the printed circuit board 14. A weak line 32 having a V-shaped cross section is formed at a connection portion between the connection piece 31 and each flange 21.

In order to join such spring terminals 25, 25 to the respective wiring patterns 14a of the printed circuit board 14, the respective insertion pieces 17 are inserted into the through holes 16 of the printed circuit board 14, and the horizontal portions 15b and the respective flanges are formed. Parts 21, 22
Is brought into close contact with the end face 13a of the case 13, and while maintaining this state, each joint 15a is soldered to each wiring pattern 14a. Thereafter, the connecting piece 31 is cut off from the weak line 32. Thereby, as shown in FIG. 1, mutual short-circuiting of the spring terminals 25, 25 is interrupted so that the spring terminals 25, 25 function as electric input terminals in a state where the electromagnetic sounding body is attached to the main body case 6. . By taking such measures,
At the stage when each insertion piece 17 is inserted into each through-hole 16, the horizontal position of the pair of spring terminals 25, 25 is mutually determined,
For this reason, workability in soldering the spring terminal 25 is greatly improved.

When the connecting pieces 31 are formed integrally with the spring terminals 25, 25, if the connecting pieces 31 are formed of a resin which is an electrical insulator, the spring terminals 25, 25 can be formed on the printed circuit board 1.
It is not necessary to remove the connecting piece 31 after joining to the fourth wiring pattern 14a. Naturally, the connecting piece 31 in such a configuration serves to attach the electromagnetic sounding body to the main body case 6 and stably contact the spring terminals 25, 25 to the wiring pattern 7 a of the printed circuit board 7. Designed to not interfere.

(4) Fourth Embodiment Next, referring to FIG. 8, the spring terminal 1 of the first embodiment will be described.
A fourth embodiment in which the fifth embodiment is modified will be described. The spring terminal 45 shown in FIG. 8 has the above-described spring terminal 15 as a basic configuration.
1 are integrally formed. This elastic piece 41 has a side view U
The horizontal part 15b is the end face 13a of the case 13.
When they are brought into close contact with each other, they come into contact with the wiring patterns 14a of the printed board 14 and are elastically deformed. In such a state of elastic deformation, the elastic piece 41 is soldered to the wiring pattern 14a together with the joint 15a. In this case, it is not particularly necessary to form the through hole 16 in the wiring pattern 14a, but the through hole 16 may be formed for positioning the elastic piece 41.

According to the spring terminal 45 of the fourth embodiment, the elastic piece 41 is
By pressing against a, the connection becomes more reliable and the conduction is stabilized.

(5) Fifth Embodiment Next, a fifth embodiment of the present invention will be described with reference to FIGS. In the electromagnetic sounding body (electroacoustic transducer) of the fifth embodiment indicated by reference numeral 51 in these figures, a sounding section 52 that sounds when an electric signal is supplied is built in a cylindrical case 53, and a sounding section 52 is formed. + And-wiring patterns 5 on a printed circuit board (electric input unit) 54 fixed on
4a, the spring terminals 55 are respectively joined. In this case, the spring terminal 55 is formed in a substantially rectangular shape, and the joining portion 55a is joined to the wiring pattern 54a of the printed board 54 by soldering. The spring terminal 55
In this joined state, the bent portion 55c extends horizontally from the joined portion 55a and bends downward at an obtuse angle via a horizontal portion 55b placed on the end surface (reference surface) 53a of the case 53.
5d extends obliquely downward, and a bent contact portion 55e is formed at the tip thereof. The positioning of the spring terminal 55 in the up-down direction (elastic deformation direction) is performed by bringing the horizontal portion 55b into surface contact with the end surface 53a of the case 53.

As shown in FIG. 10, for example, the lower surface of the case 53 is fixed to a printed circuit board (electric output section) 61 by a fixing means such as a double-sided adhesive tape.
In this fixed state, the contact portion 55e elastically contacts the wiring pattern 61a of the printed board 61.

The spring terminal 55 of the electromagnetic sounding body 51 is
The horizontal portion 55b abuts on the end surface 53a of the case 53 and is joined to the wiring pattern 54a of the printed circuit board 54, so that the horizontal portion 55b and the contact
5e is always constant in the vertical direction. Also,
In a state where the electromagnetic sounding body 51 is fixed to the printed board 61, the distance in the vertical direction between the end surface 53a of the case 53 and the wiring pattern 61a of the printed board 61 with which the contact portion 55e of the spring terminal 55 contacts is also constant. is there. Therefore,
The distance from the horizontal portion 55b of the spring terminal 55 to the wiring pattern 61a is naturally constant. As a result, the spring terminal 5
5, the positioning accuracy in the vertical direction is improved, and the wiring pattern 6
The contact pressure of the contact portion 55e with respect to 1a is always constant,
Stable quality can be obtained.

The embodiments of the present invention have been described above, but the configuration of the present invention is not limited to these embodiments.
For example, taking the first embodiment as an example, if the position of the printed circuit board 14 with respect to the main body case 6 is always kept constant, such as when the printed circuit board 14 serving as an electric input unit is integrally formed with the case 13, A reference surface for positioning the spring terminal 15 in the vertical direction is set on the surface of the printed circuit board 14,
The design may be changed so that the joint 15a can abut on the surface. In each of the above embodiments, the electromagnetic sounding body is exemplified as an example of the electroacoustic transducer. However, the present invention is not limited to this, and may have another operation principle or structure such as an electrodynamic type or a piezoelectric type. Needless to say, it is applicable.

[0035]

As described above, according to the electro-acoustic transducer of the present invention, the distance between the spring terminal and the electric output portion of the mounting member in the elastic deformation direction of the spring terminal when mounted on the mounting member. A reference surface that is always constant is set, and the spring terminal is in contact with this reference surface, and the spring terminal is joined to the electrical input unit. The contact pressure of the terminal is always constant, and the jointability such as soldering to the electric input portion is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an attached state of an electromagnetic sounding body according to a first embodiment of the present invention.

FIG. 2 is a plan view of the electromagnetic sounding body according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a view illustrating a spring terminal according to the first embodiment of the present invention, in which (a) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 5 is a view illustrating a spring terminal according to a second embodiment of the present invention, in which (a) is a plan view, (b) is a front view, and (c) is a side view.

FIG. 6 is a plan view of an electromagnetic sounding body to which a spring terminal according to a second embodiment of the present invention is joined.

7A and 7B are diagrams illustrating a method of forming a spring terminal according to a third embodiment of the present invention, wherein FIG. 7A is a plan view, FIG. 7B is a front view, and FIG.

FIG. 8 is a view illustrating a spring terminal according to a fourth embodiment of the present invention, in which (a) is a front view and (b) is a side view.

FIG. 9 is a perspective view of an electromagnetic sounding body according to a fifth embodiment of the present invention.

FIG. 10 is a side view of a state in which an electromagnetic sounding body according to a fifth embodiment of the present invention is fixed to a printed circuit board.

FIG. 11 is a longitudinal sectional view showing an example of a conventional electromagnetic sounding body.

FIG. 12 is a longitudinal sectional view showing another example of a conventional electromagnetic sounding body.

[Explanation of symbols]

6 ... body case (attachment member), 7 ... printed circuit board (electric output unit), 7a, 61a ... wiring pattern, 11, 51 ...
Electromagnetic sounding body (electroacoustic transducer), 12 ... sounding section, 1
3, 53: case, 13a, 53a: case end surface (reference surface), 14, 54: printed circuit board (electric input unit), 1
5, 25, 45, 55 ... spring terminals, 15a, 55a ... joints of spring terminals, 16 ... through holes (positioning means), 17 ...
Insert pieces (positioning means), 21, 22..., Flange section, 61... Printed circuit board (electric output section).

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[Procedure amendment]

[Submission date] April 23, 1998

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 10

FIG. 4

FIG. 5

FIG. 6

FIG. 7

FIG. 8

FIG. 9

FIG. 11

FIG.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H05K 1/18 H05K 1/18 U

Claims (6)

[Claims] An electronic device comprising: a sound generating unit that sounds when an electric signal is supplied; a case including the sound generating unit; a spring terminal joined to an electric input unit formed in the sound generating unit; Is attached to a predetermined position of the mounting member, so that the spring terminal comes into contact with an electrical output portion provided on the mounting member with a contact pressure based on its elasticity. A reference surface in which the distance between the spring terminal and the electric output portion in the elastic deformation direction of the spring terminal is always constant, and the spring terminal is brought into contact with the reference surface and joined to the electric input portion. An electroacoustic transducer characterized by being performed. 2. The electroacoustic transducer according to claim 1, wherein the reference plane is provided on the case. 3. The electro-acoustic transducer according to claim 1, wherein the case is provided with the electric input unit, and the reference plane is provided on the electric input unit. 4. The electrical connector according to claim 1, wherein at least a part of the joint between the spring terminal and the electric input unit is separated from each other, and the joint between the two is joined by a conductive joint. 4. The electroacoustic transducer according to any one of claims 1 to 3. 5. A positioning means for positioning a joint of the spring terminal and the electric input portion in a direction substantially orthogonal to a direction of elastic deformation of the spring terminal with respect to the electric output portion. The electroacoustic transducer according to any one of claims 1 to 4, wherein 6. The electric device according to claim 1, wherein a flange portion that comes into surface contact with the reference surface is provided at a contact portion of the spring terminal with the reference surface. Sound transducer.